SINGLE/MULTI GROOVE COLLETS - VALVE LOCKS TO SUIT FORD FALCON EA EB ED EF EL 1989-JAN 1998 4L 6 CYLINDERSINGLE MULTI GROOVE COLLETS VALVE LOCKS TO SUIT FORD FALCON EA EB ED EF EL 1989 JAN 1998 4L 6 CYLINDER (TO SUIT FORD FALCON EA EB ED EF EL NATURALLY ASPIRATED 4L INLINE 6 I6) Safely increasing cam lift or maximum engine RPM can require new Valve Locks Groove Collets. On the Ford Falcon engines we use Crow Cam Valve Locks. What application? This kit will suit all EA EB ED EF EL engines up until January 1998. Multi Groove Collet Suits Multi Groove Valve